Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Beloit, WI

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:24AMSunset 8:21PM Tuesday May 23, 2017 12:06 AM CDT (05:06 UTC) Moonrise 4:17AMMoonset 5:45PM Illumination 7% Phase: Waning Crescent; Moon at 27 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
    EDIT      (on/off)   Help
LMZ646 Wind Point Wi To Winthrop Harbor Il- 904 Pm Cdt Mon May 22 2017
Rest of tonight..Southwest wind 10 to 20 knots easing to 5 to 10 knots with gusts to around 15 knots after midnight. Chance of showers with a slight chance of a Thunderstorm. Patchy fog early in the morning. Waves 1 to 2 feet.
Tuesday..Southeast wind 5 to 10 knots backing east late in the afternoon. Patchy fog through the day. Scattered showers in the morning. Numerous showers and slight chance of Thunderstorms in the afternoon. Waves around 1 foot.
Tuesday night..Northeast wind 5 to 10 knots rising to 10 to 15 knots with gusts to around 20 knots in the late evening and overnight. Rain showers likely through around midnight, then chance of showers after midnight. Waves 1 to 2 feet.
Wednesday..North wind 15 to 20 knots becoming 15 to 25 knots late in the afternoon. Chance of showers. Waves 1 to 3 feet building to 4 to 6 feet. A small craft advisory may be needed.
LMZ646 Expires:201705231015;;055286 FZUS53 KMKX 230204 NSHMKX NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 904 PM CDT MON MAY 22 2017 FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN LMZ646-231015-

7 Day Forecast for Marine Location Near Beloit, WI
   Hourly   EDIT   Help
location: 42.52, -89.05     debug


Area Discussion for - Milwaukee/Sullivan, WI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kmkx 230442
afdmkx
area forecast discussion
national weather service milwaukee/sullivan wi
1142 pm cdt Mon may 22 2017

Aviation(06z tafs) Showers and a few t-storms will continue to
affect western CWA next few hours but should start to abate some
as upper level jetlet rotates farther north into central wi. Low
pressure slowly approaching from the west resulting in diminishing
winds with high low level rh lingering over southern wi. Seeing
some increase in sct-bkn MVFR clouds across southern wi so expect
this trend to continue as low edges closer during the late night
into Tuesday morning.

Prev discussion (issued 923 pm cdt Mon may 22 2017)
update... Thunderstorms continue to wax and wane but have mostly
lost some of their punch since the early evening. Low level jet
pivoting off to the east contributed to late afternoon convection.

However lingering weak elevated instability and upper level jetlet
rounding the base of the trof and affecting southern wi may
continue to generate showers and a few storms through the late
night. Diminishing winds and increasing low level convergence wl
likely result in low clouds and patchy fog late tonight into
Tuesday.

Marine... Allowed small craft advisory to expire at 02z. Winds
still gusty over southern zone from wind point to winthrop harbor
but have diminished to below 22 knots. Racine reef currently at 18
mph and decreasing. The winds will continue to diminish overnight
to less than 10 knots. Diminishing winds and high low level rh may
allow areas of fog to develop late tonight into Tuesday. The fog
may become dense for a time on Tuesday.

Prev discussion... (issued 619 pm cdt Mon may 22 2017)
aviation(00z tafs)... Scattered convection has spread across
southern portion of CWA last several hours. Strongest storm
deposited dime size hail in/near monroe around 23z. That storm has
since weakened. Thinking convection formed due to earlier weak low
level convergence along instability axis. Some weakening of
convection last 30-45 minutes or so. Will need to continue chance
pops at least through the evening due to lingering instability and
nearby frontal boundary. With diminishing winds and high low level
rh, still expect areas of low clouds to develop later tonight into
Tuesday morning.

Prev discussion... (issued 344 pm cdt Mon may 22 2017)
short term...

tonight and Tuesday... Forecast confidence medium.

With skies clearing off in the wake of this initial rain area
some buildup of MLCAPE has occurred to our west in iowa however
low level convergence noted with wind shift and dew point
discontinuity into SW wi. So expecting further development of
shra/tsra into the evening hours ESP in the western portion of the
cwa. Meso models have been pretty consistent with this evolution.

The approach of a 250 millibar jet core on eastern side of trough
will be enhancing upper divergence as well. Any tsra expected to
remain below severe levels with better air (instability wise) to
our west. 500 millibar low will continue to drop south into iowa
through the end of Tuesday. The surface low will evolve well south
with an inverted trough extending into the area. The 500 millibar
low will keep disturbances pivoting in from the southwest as
overall trough axis remains to our west through the end of the
day. So pops will be on the higher side this period though some
dry times as well.

Tuesday night through Thursday... Forecast confidence medium.

An upper low will drop south from ia to mo Tue nt with
cyclogenesis over the WRN portion of the ohio river valley. Pva
from the upper low and an inverted sfc trough extending into srn
wi will continue the light rain into Tue eve before becoming more
spotty. For wed, the low pressure area will track to in or ohio
and then possibly lower mi for Wed nt. Thus SRN wi will be on the
wrn periphery of the low pressure area with small chances of
showers and continued cool temps. The large low pressure area will
finally shift far enough east on Thu for high pressure to build
into the region for the afternoon and night. Therefore, more
sunshine and warmer temps are expected. 0.30-0.60 inches of rain
is forecast from tnt-wed.

Long term... Friday through Monday... Forecast confidence medium.

Temps will return to near normal for this period although there is
uncertainty on how much cooling may occur with another large upper
trough that may drop into the great lakes. The large upper trough
will bring chances of showers and slight chances of tstorms for
the weekend.

Aviation(18z tafs)... With slowly advancing trough axis expect
coverage of shra/isold tsra to be on the increase tonight. Wind
fields will weaken and with an uptick in low level moisture may
see some fog development tonight. Low pressure will continue to
develop to our south Tuesday with inverted trough axis extending
northward into SRN wi. MOS guidance showing MVFR CIGS evolving
tonight into Tuesday and some lower CIGS possible especially with
onshore flow near the lake. Unsettled pattern with the slowly
developing low pressure and only gradual eastward movement over
the next couple of days.

Marine... Gusty southwest winds are expected into the early
evening. Gusts up to 25 knots are anticipated, so a small craft
advisory is in effect from until 9 pm. Highest waves will be
toward the open waters.

Will have to watch any fog trends later tonight into Tuesday as
dew points will be up and overall flow is expected to be weaker.

Brisk northeast winds will probably reach small craft advisory
criteria on Wednesday.

Mkx watches/warnings/advisories
Wi... None.

Lm... None.

Aviation... mbk


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KNSW3 - Kenosha, WI 66 mi67 min SW 8 G 16 62°F 1011.2 hPa (+0.0)
WHRI2 - Waukegan Harbor, IL 66 mi67 min WSW 15 G 24 61°F
MLWW3 - Milwaukee, WI 72 mi47 min WSW 12 G 13 62°F

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last
24hr
SW6
G16
SW7
G13
SW6
G12
SW6
G12
SW6
G10
SW4
G8
SW5
S9
SW9
G12
SW7
G11
SW10
G16
S12
G18
SW12
G17
SW9
G16
S12
G16
SW12
G17
SW14
G19
S14
G17
SW10
G18
SW13
G19
SW9
G13
SW10
G14
SW9
G14
SW10
G15
1 day
ago
S3
S5
SE5
G8
S4
S5
S5
G8
W6
G16
SW4
G8
SW6
G11
SW5
G12
W5
G14
SW8
G16
SW7
G15
S10
G17
SW8
G17
SW11
G21
SW6
G13
SW6
G14
SW10
G16
SW10
G19
SW6
G11
SW7
G13
SW8
G12
SW7
G10
2 days
ago
NE14
G19
NE13
G16
NE13
E12
G17
NE12
NE10
E12
G15
E14
G17
E12
G15
NE6
NE2
NE4
E6
E4
G9
SE5
G9
SE6
G9
SE3
SE4
G7
E4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Janesville-Rock County, WI7 mi72 minSSW 810.00 miMostly Cloudy59°F55°F88%1010.8 hPa
Rockford, Greater Rockford Airport, IL22 mi73 minSSW 1110.00 miA Few Clouds58°F54°F87%1011.9 hPa

Wind History from JVL (wind in knots)
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last 24hrSW10W10
G15
W11
G17
W7SW5SW6SW6SW10
G15
SW12SW11SW11
G17
SW14
G19
W11
G16
W8W7S6SW13SW13
G20
SW13
G17
SW13S8S9SW11
G15
S9
1 day agoE3SE5S3SW8SW4W9SW6SW11
G16
W10
G20
SW12
G20
W13
G19
SW14
G18
SW14
G20
W14
G22
SW17
G22
W17
G22
SW13
G20
W11
G16
SW11
G17
SW9
G15
NW10SW9
G15
SW10
G16
W12
G15
2 days agoE7E8E8E14E12
G19
E11E12E13
G17
E11E16
G21
E7
G14
E14
G20
E17
G21
E11
G20
E15E11
G16
E10E7E10E11E10E7E6E4

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Milwaukee/Sullivan, WI (1,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Milwaukee, WI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.